JPS6283937A - Both sides copying machine - Google Patents

Abstract

PURPOSE:To eliminate hooking when feeding paper under forward/reverse operation by providing projections which can pass the lower end section of a guideboard covering the outside of a reversible rotary member and the tip of a push-up board of a stacker. CONSTITUTION:A drive shaft 21 secured with the base end section of a push-up board 18 of a stacker is held flush with the bottom face of the stacker when rotating a rotary member 16 forwardly and containing a recording paper in the stacker. While when feeding a recording paper on the stack again, the rotary member 16 is rotated reversely to move the tip of the pushboard 18 upwardly and bring near to the rotary member 16. Here, a projection 23 provided at the tip 18' of the pushboard 18, will pass through a gap (recess) 22' between the projected portions 22 of the guideboard 17, thereby the recording paper will never hook between the push-up board 18 and the guideboard 17. Consequently, the recording paper can be fed in/out stably.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a double-sided copying device, and particularly to problems that occur when recording paper after one-sided copying is loaded into a stacker, and when paper is re-fed from the stacker to a copying unit. The present invention relates to a double-sided copying device that can prevent folding of the leading edge of paper or poor conveyance.

[Background of the invention]

In general, double-sided copying devices are capable of storing recording paper that has been copied on one side in the copying section into a stacker provided below the copying section, and then refeeding the paper from the stacker to the copying section to make copies on both sides. There is. When this recording paper storage and paper refeeding mechanism is shared by one friction wheel capable of forward and reverse rotation, the lower end of the guide plate that covers the outside of the friction ring and the recording paper accommodated in the stacker are pressed against the friction wheel. The relationship between the tip and the tip of the push-up plate, which moves up and down, is important. That is, if the lower end a' of the guide plate a and the tip b' of the push-up plate are close to each other as shown in FIG. There was a risk that the tip C' of the guide plate C might be broken, so the lower end a' of the guide plate a and the tip b' of the push-up plate were separated by a certain distance, as shown in (2) in the same figure, and the lower end of the guide plate a If a' is tilted toward the push-up plate side, the above-mentioned risk can be eliminated, but there is a risk that the leading edge of the recording paper will get caught in the gap d between the guide slope and the tip of the push-up board when storing the recording paper. As a result, the leading edge of the recording paper pushed up by the push-up plate hangs down and comes into line contact with the rotating member e, as shown in (2) in the figure, and there is a possibility that paper refeeding may become unstable.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a double-sided copying apparatus that can eliminate recording paper from getting caught during storage and from folding or sagging of the leading edge when refeeding.

[Structure of the invention]

In order to achieve the above object, the present invention includes a rotating member that rotates in forward and reverse directions so as to store recording paper after single-sided copying into a stacker and refeed the paper from the stacker to a copying unit, and a guide that covers the outside of the rotating member. In a double-sided copying device, the lower end of the guide plate and the tip of the push-up plate rub against each other in a double-sided copying device equipped with a plate and a push-up plate that operates to press recording paper stored in a stacker against a rotating member when refeeding the paper. It is configured to have a protrusion that can be pulled out.

[Example] Next, the present invention will be explained based on the example shown in FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes the main body of the copying machine, and 2 denotes a primary paper feeding means. It is something that cannot be supplied. 5 is a conveyor belt for carrying the recording paper 3 copied in the copying section 4;

6 is a fixing section for the recording paper 3 sent by the conveyance heald 5, and 7 is a paper discharge section for discharging the recording paper 3 after fixing. A guide roller 8 is provided on the paper discharge path 9 that connects the fixing section 6 and the paper discharge section 7, and a movable guide plate has a curved tip so as to cover the guide roller 8 from the paper discharge section 7 side. 1o is provided. The base end of the movable guide plate 1o is pivotally supported by the frame of the paper discharge section 7 via a shaft 11.

A position where the guide roller 8 is covered (solid line) and a retracted position (two-dot chain line) can be selected by operating a solenoid (not shown).

Reference numeral 12 denotes a duplex unit attached to the lower surface of the copying apparatus main body 1, and the duplex unit 12 directs the recording paper 3 flowing down along the movable guide plate 10 in a straight line toward the primary paper feeding means 2 side of the copying apparatus main body 1. A primary paper feeding path 13 for IM feeding is provided, and a secondary paper feeding means 14 is provided on the front side of the feeding section 13.
It is equipped with The secondary paper feeding means 14 stores the recording paper after single-sided copying into a stacker 15, and passes the recording paper path 2a of the primary paper feeding means 2 from the stacker 15 to the copying section 4 again.
A rotating member (which may be a rotating belt) 16 that rotates in forward and backward directions so as to re-feed the paper to the stacker 15, a guide plate 17 that covers the outside of the rotating member 16, and a rotating member 16 that re-feeds the recording paper 3 after being stored in the stacker 15. It is provided with a push-up Fj, 18 which operates so as to bring the paper into pressure contact with the rotating member 16. 19 is a double-feed prevention roller biased by a spring so as to come into pressure contact with the outer surface of the rotating member 16;
20 is an auxiliary roller.

Note that the double-feed prevention roller 19 is in a free rotation state when feeding the recording paper 3 to the stacker 15, but is in a non-rotating state when feeding the recording paper 3 from the stacker 15, and only one sheet of the recording paper 3 is fed. It functions so that it can be separated one by one.

Reference numeral 21 denotes a drive shaft to which the base end of the push-up plate 18 is fixed, and the drive shaft 21 holds the push-up plate 18 on the same surface as the bottom surface of the stacker 15 when storing the recording paper 3, and moves the push-up plate 18 from the stacker 15 to the copy section. When re-feeding the paper to 4, the tip of the push-up plate 18 is rotated so as to move upward.

22 is a projection provided on the lower end 17' of the guide plate 17;
3 is a protrusion provided at the tip 18' of the push-up plate 18.

The protrusions 22 and 23 are provided at positions where they can rub against each other.1 For example, if the protrusions 22 of the guide plate 17 are provided at both ends and the middle part, respectively, as shown in the second figure, the The protrusion 23 of the push-up plate 18 may be provided at a position where the gap (concave groove) 22' can be rubbed. There is no limit to the number of pieces, etc.

In the above embodiment, when the recording paper after one-sided copying is fed into the stacker 15 by the rotation of the rotating member 16 in the direction of arrow "A" as shown in FIG. Moreover, the projections 22 and 23 at the image tips of the guide plate 17 and the push-up plate 18 fit into each other.

Therefore, there is no gap between the tips of the guide plate 17 and the push-up plate 18, and even if the fed recording paper is curled downward, it will not get caught. After the recording paper 3 after copying is stored.

The push-up plate 18 moves upward as shown in FIG.
When the uppermost layer of the recording paper is pressed onto the lower surface of the rotating member 16, the recording paper is held by the protrusion 23 at the tip of the push-up plate 18 so that the tip does not sag.

〔Effect of the invention〕

As explained above, the present invention includes a rotating member that rotates forward and backward to store recording paper after single-sided copying into a stacker and refeed the paper from the stacker to a copying section, and a guide plate that covers the outside of the rotating member. .

In a double-sided copying device equipped with a push-up plate that operates to press the recording paper stored in the stacker against a rotating member when refeeding the paper, the lower end of the guide plate and the tip of the push-up plate have protrusions that can pass through each other. This feature is characterized by the provision of a guide plate and a push-up plate, so that when the recording paper after one-sided copying is fed into the stuff car by normal rotation of the rotating member, even if the leading edge of the recording paper is curled downward, the guide plate and push-up plate There is no gap between the leading edges of the recording paper where the leading edge of the recording paper can get caught, and even when the push-up plate moves up the recording paper in the stacker and presses it against the bottom surface of the rotating member, there is no gap between the leading edges of the guide plate and the pushing-up plate. This provides an excellent effect in that the paper does not dig into the paper or create a gap where the paper sag, thereby making it possible to stably feed the paper when refeeding the paper.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is an overall sectional view, FIG. 2 is a schematic perspective view of the main part, and FIG.
Figures I and 2 are cross-sectional views showing the operation, and Figures 4-4 are cross-sectional views of the conventional example. 1-Copying device main body 2-=-Primary paper feeding means 3-Recording paper 4-Copying section 14-Secondary paper feeding means 15-Friction wheel 16-Stacker 17-Guide plate 18-Pushing plate 22.23-・When protruding Applicant Konishiroku Photo Industry Co., Ltd. Figure 2

Claims (1)

[Claims] A rotating member that rotates in forward and reverse directions to store the recording paper after single-sided copying into the stacker and re-feed the paper from the stacker to the copying section, a guide plate that covers the outside of the rotating member, and a guide plate that stores the recording paper after being stored in the stacker. A double-sided copying device equipped with a push-up plate that operates to press against a rotating member when refeeding paper, characterized in that a protrusion that can slide through each other is provided at the lower end of the guide plate and the tip of the push-up plate. Double-sided copying device.